how to fix P0171 code on my Genesis G70 IG (2017-2023)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical hazards.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum lines and the intake manifold for cracks or disconnections.
  2. Replace any damaged hoses with OEM parts.
  3. Ensure the intake air duct is securely attached and not damaged.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor on the air intake assembly.
  2. Carefully remove the MAF sensor connector.
  3. Remove the MAF sensor from the intake using a socket set.
  4. Clean the sensor with MAF cleaner and allow it to dry completely. If damaged, replace with a new sensor.

4. Check Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the "on" position (do not start the engine) and check the pressure reading.
  3. If the pressure is low, check the fuel pump operation and replace if necessary.
  4. Inspect and clean fuel injectors using a fuel injector cleaner or replace if clogged.

5. Verify Engine Coolant Temperature Sensor

• Sub-steps:
  1. Locate the engine coolant temperature sensor.
  2. Disconnect the sensor connector and remove the sensor.
  3. Use a multimeter to check the resistance of the sensor at various temperatures (refer to the service manual for specifications). Replace if out of spec.